Tread cover



FIG. 1 is a front view of the tread cover, showing my new design, note the ladder partially displayed in phantom;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side elevational view thereof, note the tread passageway there through;

FIG. 4 is a left side elevational view thereof, again noting the tread passageway there through;

FIG. 5 is top plan view thereof; and,

FIG. 6 is bottom plan view thereof. 

The ornamental design for a tread cover, as shown and described. 